Bull of Heaven

Divine Presence. The bull radiates a potent holy aura around itself. Each hostile creature that starts its turn within 20 ft. of the bull, or starts its turn there takes 10 radiant damage.

Ordained. The bull's attacks are magical. When the bull hits with a melee attack, it deals an extra 9 (2d8) radiant damage (included in the attacks).

Magic Resistance. The bull has advantage on saving throws against spells and other magical effects.

Siege Monster. The bull deals double damage to objects and structures.

Wild Spirit. When the bull's hit points fall below half of its maximum, it becomes enraged. While enraged, its Multiattack changes (as described below), and it loses its Magic Resistance trait.

Multiattack. The bull can use its Earthstomp. It then makes two Gore attacks, or four Gore attacks if the bull is enraged.

Gore. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 13 (1d10+8) piercing damage, plus 9 (2d8) radiant damage.

Earthstomp. The bull stomps the ground, sending shockwaves out in a 20 ft. radius around it. Each creature within that area must succeed on a DC 23 Dexterity saving throw or take 17 (5d6) bludgeoning damage and be knocked Prone. On a success, a creature takes half as much damage only.

Voice of Inanna (1/Day). The bull bellows an ear-shattering roar infused with the wrath of divinity. Each hostile creature within 100 ft. of the bull must make a DC 21 Wisdom saving throw, with disadvantage if the creature is a Fiend or an Undead. On a failure, a creature takes 38 (7d10) radiant damage, has disadvantage on attack srolls, and cannot concentrate on spells or magical effects that require concentration for 1 minute. On a success, an affected creature instead takes 22 (4d10) radiant damage only. A creature that suffered this attack's full effect can remake its saving throw at the end of its next turn, ending the effect on itself on a success.